﻿using System;
using System.Diagnostics;
using System.Globalization;
using System.Runtime.InteropServices;
using System.ComponentModel.Design;
using Microsoft.Win32;
using Microsoft.VisualStudio;
using Microsoft.VisualStudio.Shell.Interop;
using Microsoft.VisualStudio.OLE.Interop;
using Microsoft.VisualStudio.Shell;
using EnvDTE;
using System.Windows;
using OD.ProjectCustomizationTool;
using OD.ProjectCustomizationTool.Helpers;

namespace ObjectDirect.OD_ProjectCustomizationTool_VSPackage
{
    /// <summary>
    /// This is the class that implements the package exposed by this assembly.
    ///
    /// The minimum requirement for a class to be considered a valid package for Visual Studio
    /// is to implement the IVsPackage interface and register itself with the shell.
    /// This package uses the helper classes defined inside the Managed Package Framework (MPF)
    /// to do it: it derives from the Package class that provides the implementation of the 
    /// IVsPackage interface and uses the registration attributes defined in the framework to 
    /// register itself and its components with the shell.
    /// </summary>
    // This attribute tells the PkgDef creation utility (CreatePkgDef.exe) that this class is
    // a package.
    [PackageRegistration(UseManagedResourcesOnly = true)]
    // This attribute is used to register the information needed to show this package
    // in the Help/About dialog of Visual Studio.
    [InstalledProductRegistration("#110", "#112", "1.0", IconResourceID = 400)]
    // This attribute is needed to let the shell know that this package exposes some menus.
    [ProvideMenuResource("Menus.ctmenu", 1)]
    // This attribute registers a tool window exposed by this package.
    [Guid(GuidList.guidOD_ProjectCustomizationTool_VSPackagePkgString)]
    public sealed class VSPackage : Package
    { 
        #region Properties

        private static IVsMonitorSelection MonitorSelection
        {
            get
            {
                return (IVsMonitorSelection)Package
                    .GetGlobalService(typeof(SVsShellMonitorSelection));
            }
        }

        private static Project SelectedProject
        {
            get
            {
                IntPtr hierarchyPointer, selectionContainerPointer;
                Object selectedObject = null;
                IVsMultiItemSelect multiItemSelect;
                uint projectItemId;

                VSPackage.MonitorSelection.GetCurrentSelection(
                    out hierarchyPointer,
                    out projectItemId,
                    out multiItemSelect,
                    out selectionContainerPointer);

                IVsHierarchy selectedHierarchy = Marshal.GetTypedObjectForIUnknown(
                                                     hierarchyPointer,
                                                     typeof(IVsHierarchy)) as IVsHierarchy;

                if (selectedHierarchy != null)
                {
                    ErrorHandler.ThrowOnFailure(selectedHierarchy.GetProperty(
                                                      projectItemId,
                                                      (int)__VSHPROPID.VSHPROPID_ExtObject,
                                                      out selectedObject));
                }

                return (Project)selectedObject;
            }
        }

        #endregion

        #region Methods

        /// <summary>
        /// Initialization of the package; this method is called right after the package is sited, so this is the place
        /// where you can put all the initialization code that rely on services provided by VisualStudio.
        /// </summary>
        protected override void Initialize()
        {
            Debug.WriteLine(string.Format(CultureInfo.CurrentCulture, "Entering Initialize() of: {0}", this.ToString()));
            base.Initialize();

            // Add our command handlers for menu (commands must exist in the .vsct file)
            OleMenuCommandService mcs = GetService(typeof(IMenuCommandService)) as OleMenuCommandService;
            if (null != mcs)
            {
                // Create the command for the menu item.
                CommandID menuCommandID = new CommandID(GuidList.guidOD_ProjectCustomizationTool_VSPackageCmdSet, (int)PkgCmdIDList.cmdidODProjectCustomizationTool);
                MenuCommand menuItem = new MenuCommand(MenuItemCallback, menuCommandID);
                mcs.AddCommand(menuItem);

            }
        }

        /// <summary>
        /// This function is the callback used to execute a command when the a menu item is clicked.
        /// See the Initialize method to see how the menu item is associated to this function using
        /// the OleMenuCommandService service and the MenuCommand class.
        /// </summary>
        private void MenuItemCallback(object sender, EventArgs e)
        {
            try
            {
                ToolsManager.Update(VSPackage.SelectedProject, new VSOutputWindowLogger());
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
        }

        #endregion

    }
}
